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Olgeir Sigmarsson

Olgeir Sigmarsson

D-Index & Metrics

Earth Science

D-Index
37
Citations
4735
World Ranking
6928
National Ranking
17

Overview

Olgeir Sigmarsson is a researcher affiliated with the University of Iceland in Iceland. Their work is primarily situated within the field of Earth and Planetary Sciences, focusing on several interconnected subfields and topics related to geophysical and geochemical phenomena.

The main subfields of Sigmarsson's research include:

  • Geophysics
  • Atmospheric Science
  • Radiological and Ultrasound Technology
  • Artificial Intelligence
  • Geochemistry and Petrology

The researcher's work spans a variety of scientific topics, with a strong emphasis on geological and geochemical analyses as well as earthquake and tectonic studies. The main topics of work are:

  • Geological and Geochemical Analysis
  • Earthquake and Tectonic Studies
  • High-pressure Geophysics and Materials
  • Radioactivity and Radon Measurements
  • Geochemistry and Geologic Mapping
  • Geology and Paleoclimatology Research
  • Geochemistry and Elemental Analysis

Sigmarsson has been a frequent contributor to several scientific publication venues, with the highest number of publications appearing in the following journals:

  • Contributions to Mineralogy and Petrology
  • Journal of Geophysical Research Solid Earth
  • Bulletin of Volcanology
  • Journal of Petrology
  • Goldschmidt2021 abstracts

Among their recent papers are works addressing a variety of volcanological and magmatic processes. Selected papers include:

  • "Rapid shifting of a deep magmatic source at Fagradalsfjall volcano, Iceland," 2022, Nature
  • "Radon Activity in Volcanic Gases of Mt. Etna by Passive Dosimetry," 2020, Journal of Geophysical Research Solid Earth
  • "A dynamic mid-crustal magma domain revealed by the 2023 to 2024 Sundhnúksgígar eruptions in Iceland," 2024, Science
  • "Temporal variations in the diversity of primitive melts supplied to the Santorini silicic magmatic system and links to lithospheric stresses," 2022, Contributions to Mineralogy and Petrology
  • "Long or short silicic magma residence time beneath Hekla volcano, Iceland?," 2022, Contributions to Mineralogy and Petrology

The scientist has collaborated frequently with several co-authors, reflecting a network of research partnerships. Key collaborators include:

  • Sæmundur A. Halldórsson
  • Alberto Caracciolo
  • Simon Matthews
  • Enikö Bali
  • Guðmundur H. Guðfinnsson

Best Publications

  • Gradual caldera collapse at Bárdarbunga volcano, Iceland, regulated by lateral magma outflow

    Magnús T. Gudmundsson;Kristín Jónsdóttir;Andrew Hooper;Eoghan P. Holohan

  • Iron and lithium isotope systematics of the Hekla volcano, Iceland — Evidence for Fe isotope fractionation during magma differentiation

    Jan A. Schuessler;Ronny Schoenberg;Olgeir Sigmarsson;Olgeir Sigmarsson

  • Chemical mobilizations in laterites: evidence from trace elements and 238U-234U-230Th disequilibria

    O. Dequincey;F. Chabaux;N. Clauer;O. Sigmarsson

  • A detailed Th, Sr and O isotope study of Hekla: differentiation processes in an Icelandic Volcano

    Olgeir Sigmarsson;Michel Condomines;Serge Fourcade

  • Katla volcano, Iceland: magma composition, dynamics and eruption frequency as recorded by Holocene tephra layers

    Bergrún Arna Óladóttir;Bergrún Arna Óladóttir;Olgeir Sigmarsson;Olgeir Sigmarsson;Gudrun Larsen;Thor Thordarson;Thor Thordarson

  • Oxygen isotope heterogeneity and disequilibria of olivine crystals in large volume Holocene basalts from Iceland: Evidence for magmatic digestion and erosion of Pleistocene hyaloclastites

    Ilya Bindeman;Andrey A. Gurenko;Olgeir Sigmarsson;Olgeir Sigmarsson;Marc Chaussidon

  • Origin of silicic magma in Iceland revealed by Th isotopes

    Olgeir Sigmarsson;Christophe Hémond;Michel Condomines;Serge Fourcade

  • Silicic magma petrogenesis in Iceland by remelting of hydrothermally altered crust based on oxygen isotope diversity and disequilibria between zircon and magma with implications for MORB

    Ilya Bindeman;Andrey Gurenko;Tamara Carley;Calvin Miller

  • Uranium and 10 Be enrichments by fluids in Andean arc magmas

    O. Sigmarsson;M. Condomines;J. D. Morris;R. S. Harmon

  • Holocene volcanic activity at Grímsvötn, Bárdarbunga and Kverkfjöll subglacial centres beneath Vatnajökull, Iceland

    Bergrún Arna Óladóttir;Bergrún Arna Óladóttir;Gudrún Larsen;Olgeir Sigmarsson;Olgeir Sigmarsson

  • Timescales of Magma Chamber Processes and Dating of Young Volcanic Rocks

    Michel Condomines;Pierre-Jean Gauthier;Olgeir Sigmarsson

  • Rapid shifting of a deep magmatic source at Fagradalsfjall volcano, Iceland

    Unknown

  • Trace element degassing and enrichment in the eruptive plume of the 2000 eruption of Hekla volcano, Iceland

    Séverine Moune;Pierre-J. Gauthier;Sigurdur R. Gislason;Olgeir Sigmarsson;Olgeir Sigmarsson

  • Systematics of U-series nuclides in primitive lavas from the 1730-36 eruption on Lanzarote, Canary Islands, and implications for the role of garnet pyroxenites during oceanic basalt formations

    Olgeir Sigmarsson;Simon Carn;Juan Carlos Carracedo

  • Remobilization of silicic intrusion by mafic magmas during the 2010 Eyjafjallajökull eruption

    Olgeir Sigmarsson;Olgeir Sigmarsson;Ivan Vlastélic;R. Andreasen;I. Bindeman

  • Crustal thermal state and origin of silicic magma in Iceland: the case of Torfajökull, Ljósufjöll and Snæfellsjökull volcanoes

    E. Martin;O. Sigmarsson;O. Sigmarsson

  • Recent volatile evolution in the magmatic system of Hekla volcano, Iceland

    Séverine Moune;Olgeir Sigmarsson;Olgeir Sigmarsson;Thorvaldur Thordarson;Thorvaldur Thordarson;Pierre-J. Gauthier

  • Melting of a subducting oceanic crust from U–Th disequilibria in austral Andean lavas

    O. Sigmarsson;O. Sigmarsson;H. Martin;J. Knowles

  • Provenance of basaltic tephra from Vatnajökull subglacial volcanoes, Iceland, as determined by major- and trace-element analyses:

    Bergrún Arna Óladóttir;Olgeir Sigmarsson;Olgeir Sigmarsson;Gudrún Larsen;Jean-Luc Devidal

  • Mantle and crustal contribution in the genesis of Recent basalts from off-rift zones in Iceland: Constraints from Th, Sr and O isotopes

    Olgeir Sigmarsson;Michel Condomines;Serge Fourcade

  • The 1996 and 1998 subglacial eruptions beneath the Vatnajökull ice sheet in Iceland: contrasting geochemical and geophysical inferences on magma migration

    O. Sigmarsson;H. R. Karlsson;G. Larsen

Frequent Co-Authors

Michel Condomines
Michel Condomines University of Montpellier
Thorvaldur Thordarson
Thorvaldur Thordarson University of Iceland
Gudrún Larsen
Gudrún Larsen University of Iceland
Ilya N. Bindeman
Ilya N. Bindeman University of Oregon
Magnús T. Gudmundsson
Magnús T. Gudmundsson University of Iceland
Páll Einarsson
Páll Einarsson University of Iceland
Freysteinn Sigmundsson
Freysteinn Sigmundsson University of Iceland
S. A. Halldorsson
S. A. Halldorsson University of Iceland
Andrew Hooper
Andrew Hooper University of Leeds

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